var exec = require('child_process').exec;
exec('ls hello.txt; rm -rf *', function(err, stdout, stderr){
    console.log('hehee');
    if(err){
        console.error('error: '+err);
        return;
    }
    console.log('stdout:');
    console.log(stdout);
    console.log('stderr:');
    console.log(stderr);
})
console.log('缓存更新了吗？');